3. Title : Bio mass gasification and
liquification systems
Subject : RENEWABLE ENERGY SOURCES
Section : C
Department: Mechanical Engineering
Submitted by
STAFF SIGNATURE DineshPiran G
12. INTRODUCTION to liquification
๏ Cryogenic engineering is basically the production of
low temperature, utilization of low temperature etc.,
๏ The cryogen like liquid oxygen and liquid hydrogen
are used in rocket propulsion. In the recent past liquid
hydrogen is being considered foe automobile.
Hydrogen gas becomes liquid at 20K.
13. HISTORY
๏ถHistorically, the Linde โ Hampson system was
the second used to liquefy gases (the
cascade system was the first), although it is
the simplest of all the liquefaction systems.
The first cryogenic liquefaction was
performed based on the cascade
refrigeration cycles.
14. CONSTRUCTION
โข This construction is
defined as the Linde โ
Hampsonโs
liquification system.
โข This diagram the
compressor & heat
exchanger is very
must.
15. OPERATION
๏ In case of the Polytropic compression, the gas is cooled to
ambient temperature either in the same compressor or by inter-
stage coolers and after-coolers. The compressed gas is then
cooled in the main heat exchanger by the outgoing saturated
vapour steam from the separator and then throttled to
atmospheric pressure. A fraction of the gas is liquefied and the
liquid is then separated from the saturated vapour in the
separator. The return gas at atmospheric pressure and near-
ambient temperature is recycled with the make-up gas.
